<div class="doc-item" id="doc-1495"><h2 class="doc-item-name">if-let<span class="namespace">(clojure.core)</span></h2><p class="macro">Macro</p><ul class="var-arglists"><li>(<span class="var-name">if-let</span> bindings then)</li><li>(<span class="var-name">if-let</span> bindings then else &amp; oldform)</li></ul><div class="var-docstring"><p>bindings =&gt; binding-form test</p><p>If test is true, evaluates then with binding-form bound to the value of test, if not, yields else</p></div><div class="var-source"><pre>; clojure/core.clj:1087
(defmacro if-let
  ([bindings then]
   `(if-let ~bindings ~then nil))
  ([bindings then else &amp; oldform]
   (assert-args if-let
     (and (vector? bindings) (nil? oldform)) &quot;a vector for its binding&quot;
     (= 2 (count bindings)) &quot;exactly 2 forms in binding vector&quot;)
   (let [form (bindings 0) tst (bindings 1)]
     `(let [temp# ~tst]
        (if temp#
          (let [~form temp#]
            ~then)
          ~else)))))</pre></div><div class="license"><p>Copyright (c) Rich Hickey. All rights reserved.</p><p>The use and distribution terms for this software are covered by the <a href="http://opensource.org/licenses/eclipse-1.0.php">Eclipse Public License 1.0</a>, which can be found in the file
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